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Growers should be aware that late blight can still be active in irrigated crops, regardless of the warm weather.

Late blight has been confirmed on tomatoes in Essex County, Ontario within the last seven days. The reports were confirmed on the Ontario Vegetables website. Essex County is very close to southeastern potato and tomato production (see photo) and growers should be very aware that, despite the warm weather, late blight can still be active in irrigated crops. There are still no reports of late blight in the fields in Michigan on either potatoes or tomatoes.

August 16, 2017 | Marissa Schuh | Much of our area received an inch of rain or less in the last month. The dry conditions have hindered disease development, but kept irrigation systems working overtime.

Michigan State University Extension, Mary Hausbeck, Zsofia Szendra, Ben Phillips, and Fred Warner | This annual guide is a summary of currently suggested vegetable varieties, seeding rates, fertilizer rates, weed control, insect control and disease control measures for commercial growers. A version of this publication is available at http://mwveguide.org

Darryl Warncke, Laura Bast, and Don Christenson | This bulletin covers the nature of soil acidity, the need and importance of liming the soil to neutralize acidity, comparisons of various liming materials and their neutralizing values, and guidelines for liming soils for crops grown in Michigan.

M.L. Vitosh, D.D. Warncke, and R.E. Lucas | Plant nutrients in fertilizers are classified as major nutrients and micronutrients. The most important major nutrients are nitrogen, phosphorus and potassium. Plants require these nutrients in relatively large amounts.